Through-the-earth radio

Through-the-earth radio

  • CN 1,879,392 A
  • Filed: 06/08/2004
  • Published: 12/13/2006
  • Est. Priority Date: 06/26/2003
  • Status: Active Grant
First Claim
Patent Images

1. system via the earth communication comprises:

  • The audio signal input unit;

    Transmitter, thereby operate in the enough low preset frequency that can effectively penetrate via the earth coverage, and has an AD converter, be used to receive described audio signal input, and transmit described audio signal and be input to data compression circuit, the output of this data compression circuit is connected to encode processor, and the output of described encode processor is provided for digital-to-analog converter;

    Amplifier receives simulation output from described digital-to-analog converter, amplifies described simulation output, and exports described simulation and output to antenna;

    Receiver, has antenna, be used to receive described simulation output and transmit described simulation and output to band pass filter, this band pass filter is connected to AD converter, this AD converter provides digital signal to decoding processor, the output of this decoding processor is connected to data decompressor, and described data decompressor provides the digital signal of decompression to digital-to-analog converter;

    AndAudio output device receives the simulation output from described digital-to-analog converter, can listen output to produce.

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